Answer: E) Temporary attractive forces that arise due to the random fluctuations of electron density in molecules
London Dispersion Forces are a type of van der Waals forces, which are weak intermolecular attractive forces. They arise due to the temporary fluctuations in electron density around atoms or molecules. These fluctuations create instantaneous dipoles, which in turn induce dipoles in nearby atoms or molecules. The induced dipoles lead to weak attractive forces between the molecules, known as London Dispersion Forces. They are present in all molecular substances, including polar and nonpolar molecules, and are generally stronger in larger molecules with more electrons. These forces play a significant role in determining the physical properties of substances, such as their boiling and melting points.
